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Related Experiment Video

Updated: Feb 12, 2026

Writing Bragg Gratings in Multicore Fibers

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

A fully reconfigurable waveguide Bragg grating for programmable photonic signal processing.

Weifeng Zhang¹, Jianping Yao²

¹Microwave Photonic Research Laboratory, School of Electrical Engineering and Computer Science, University of Ottawa, 25 Templeton Street, Ottawa, ON, K1N 6N5, Canada.

Nature Communications

|April 13, 2018

Summary

This summary is machine-generated.

This study introduces a novel, electrically reconfigurable Bragg grating for versatile optical signal processing. This programmable device enables ultrafast signal manipulation, advancing integrated photonics applications.

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Area of Science:

Photonics and Optical Engineering
Integrated Optics
Materials Science

Background:

Bragg gratings, discovered in 1913, are crucial optical devices with widespread applications.
Conventional gratings have fixed index modulation profiles, limiting their adaptability for general-purpose use.
The fixed nature of traditional gratings restricts their application scope due to the inability to alter their function post-fabrication.

Purpose of the Study:

To propose and demonstrate a fully reconfigurable Bragg grating system.
To enable fast, electrical reconfiguration of grating properties via field programming.
To develop a programmable optical signal processor for diverse functions.

Main Methods:

Fabrication of an integrated grating on a silicon-on-insulator (SOI) platform.
Implementation of field programming for electrical reconfiguration of the grating.
Utilizing the reconfigurable grating as a programmable signal processor.

Main Results:

Successful fabrication and demonstration of an electrically reconfigurable integrated grating.
The device performed multiple signal processing functions, including temporal differentiation and microwave time delay.
Verified the capability for frequency identification using the programmable grating.

Conclusions:

The developed ultrafast and reconfigurable gratings offer a new paradigm for programmable optical signal processing.
This technology enables signal processing at the speed of light, overcoming limitations of fixed-gratings.
The integrated silicon-on-insulator platform provides a robust foundation for advanced photonic signal processors.